And who is it who gives out the chairs?

问题描述:

And who is it who gives out the chairs?
请问这句话的意思 和句子结构

And who is it who gives out the chairs? (到底是)谁分发的这些椅子?
It is who who gives out the chairs?
It is…Who(2)为强调句型,去掉该结构之后为:
Who gives out the chairs?